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प्रश्न
Name the terms for the particles of matter which may or may not have independent existence.
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उत्तर
this criteria is shown by atoms of any matter which may exist alone (like helium) or may not exist alone and exist in molecular form (like oxygen/o₂ )
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संबंधित प्रश्न
The molecules can move freely anywhere in
What are molecules ?
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
Define matter. Give four examples of matter.
What are the characteristics of matter?
When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
Define solute.
Define Foam Give one example.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
Which of the following is not an emulsion ?
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Matter is made up of ______.
A standard sheet of paper is about ______ of atoms thick
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
The fluidity of solids: ______.
Give an example of a molecule.
Define the term matter.
